ANSWER
f(n) + g(n) = 5n + 1
EXPLANATION
We are given that:
f(n) = 2n + 1
and
g(n) = 3n
We want to find f(n) + g(n).
To do this, we simply add the two functions:
f(n) + g(n) = 2n + 1 + 3n
f(n) + g(n) = 2n + 3n + 1
f(n) + g(n) = 5n + 1
That is the answer.
